SimplyGro Fertilizer Spikes for Evergreen Trees & Shrubs provide a convenient, effective way to nourish evergreen and coniferous trees and shrubs. They're ideal for use in gardens with a large number of pine, fir, holly, cone bearing, and all other evergreen trees and shrubs. Each 5-inch plant food spike provides a boost of nitrogen, phosphorus and potassium to promote rigorous growth, strong root systems, lush leaves, and vibrant colors. Pre-measured and easy to use, SimplyGro fertilizer spikes are guaranteed not to break, smash or crush. Made in the USA, these spikes are designed for easy application in spring when plants begin their growth cycle; and in the fall as they store energy for winter. Revitalize your landscape, trees, shrubs and gardens with SimplyGro's hassle-free fertilizer solution.